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Bell’s Outdoor and Indoor Experimental Arith- 
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Noble, and P.. Steer: ‘Teacher’s Book. (Pp. xii+ 377. 
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The Progress of Eugenics. By Dr. C. W. Saleeby. 
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Military Academy and the Royal Military College for 
the Years ‘1905-13. By R. M. Milne. (London: 
Macmillan and Co., Ltd.) 6s. 
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Weed Flora of Iowa. 
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Bulletin No. 4. The 
By L. H. Pammel and others. 
(Des Moines: Iowa Geological Sur- 
DIARY OF SOCIETIES. 
THURSDAY, Apri 30. 
Royat Society, at 4.30.—The Presence of Inorganic Tron Compounds in 
the Chloroplasts of the Green Cells of Plants, considered in Relation- 
ship to Natural Photo-synthesis and the Origin of Life: Prof. B. 
Moore. —The lack of Adaptation in the Tristichaceze and Podostemacez : 
Dr J. C. Williss—The Genetics of Tetraploid Plants in Primula 
sinensis: R. P. Gregory.—The Action of certain Drugs on the isolated 
Human Uterus: J. A. Gunn.—The Influence of Osmotic Pressure 
upon the Regeneration of Gunda ulvae: T). J. Lioyd.—(1) Glossina 
brevipalpis as a Carrier of Trypanosome Disease in Nyasaland. (2) 
Trypanosome Diseases of Domestic Animals in Nyasaland. Trypanosoma 
pecorum. 11. Development in Glossina morsitans : Surg.-Gen. Sir D. 
Bruce, Major A. E. Hamerton, Capt. D. P. Watson and Lady Bruce. 
Roya INSTITUTION, at 3.—The Last Chapter of Greek Philosophy : 
Plotinus as Philosopher, Religious Teacher and Mystic: The Very Rev. 
W. R. Inge. 
FRIDAY, May «x. 
Roya InstiruTron, at 9.—A Criticism on Critics: E. F. Benson. 
Junior Institution oF ENGINEERS, at 8.—-The Control and Organisation 
of the Engineering Profession: S. T. Robson. 
Gerotoaists’ AssociaTIon, at 8.—A Geological Excursion in Matabele- 
land: F. P. Mennell. 
SATURDAY, May 2. 
Royat InstiruTion, at 3.—Similarity of Motion in Fluids. (2) The 
General Law of Surface Friction in Fluid Motion: Dr. T. E. Stanton. 
British PsycuHo.ocicaLt Society.—The Psychology of Play with Special 
Betrente bonis Value of Group Games in Education: Miss M. J. Reaney. 
—Corresp nding points: Prof. C. Spearman.—An Attempt at Xz 
Estimation of Character: E. Webb. E P aN hag 
MONDAY, May 4. 
Vicrorta InstiruTE, at 4.30.—Frederic Godet, Tutor of Frederick 
Noble: Prof. F. F. Roget. a a 
SOCIETY OF ENGINEERS, at 7.30. 
SOCIETY OF CHEMICAL, InpusTRY, at 8.—Apparatus for the Automatic 
Measuring and Injection of Chemicals: Hon. R. C. Parsons.—Jets for 
Mixing: Dr. Oscar Nagel.—A Reaction of Tetranitromethane: W. R. 
a Hodekincon. . 
RISTOTELIAN SocieTy, at 8.—The Psychology of Dissociated Per- 
sonality: Dr. W. I.eslie Mackenzie. y 
Roya Society or Arts, at 8.—Some Recent Developments in the Ceramic 
Industry: W. Burton. 
TUESDAY, May 5. 
Roya Institution, at 3.—Double Flowers: Prof. W. Bateson. 
ZOOLOGICAL SOcIETY, at 8.30. 
R6NTGEN Society, at 8.15.—X-rays and Crystals: L. W. Bragg. 
INSTITUTION OF Civit ENGINEERS at 9.—Twenty-second “‘ James Forrest” 
ees The Flying Machine from an Engineering Standpoint: F. W. 
vanchester. 
NO. 2322, VOL: 934 
NATURE 
| 
[APRIL 30, I914 
WEDNESDAY, May 6, 
Roya. Society OF Arts, at 8.—Inexpensive Motoring : A. L. Clayden. 
Society oF Pusriic ANaLystTs, at 8.—The Detection of Castor Oil Seeds: 
Dr. G. D. Lander and J. J. Geake.—The Composition of Milk: H. D. 
Richmond.—Note on ‘‘Sharps’’: J. F. Liverseege and G. D. Elsdon. 
AERONAUTICAL SOCIETY, at 8.30.—The Calculation of Aeroplane Wing- 
Spar Stresses: H. Booth. ‘ 
ENTOMOLOGICAL SOCIETY, at 8. 
THURSDAY, May 7. 
Royat Society, at 4.—Election of Fellows.—At 4.30.—Probable Papers: 
(1) Some Calculations in Illustration of Fourier’s Theorem; (2) The 
Theory of Long Waves and Bores: Lord Kayleigh.—Protection from 
Lightning and the Range of Protection afforded by Lightning Rods: Sir 
J. Larmor and J. S. B. Larmor.—The Flow in Metals subjected to 
Large Constant Stresses: E. N. da C. Andrade.—The Properties of 
Magnetically-shielded Iron as Affected by Temperature: Prof. E: Wilson 
—Eddy Motion in the Atmosphere: G. I. Taylor. 
Roya. InsTiTUTION, at 3.—The Last Chapter of Greek Philosophy : 
Plotinus as Philosopher, Religious:Teacher and Mystic : The Very Rey. 
W. R_ Inge. 
Roya Society oF ARTS, at 4.30.—The Punjab Canal Colonies: Sir J. M. 
Douie. 
Cuitp Strupy Society, at 7.30.—Education in Early Childhood before 
School-Age : Miss F. A. Parish and Dr. W. P, Sheppard. 
LINNEAN Society, at 8.—The Botany of the Utakwa Expedition in Dutch * 
New Guinea: H. N. Ridley and Others.—The Genus Lernzodiscus, F. 
Miiller : G. Smith.—The Botanic Gardens at Sibpur (Calcutta), and the 
Government Cinchona Plantations : Major Gage.—A New Natural Order 
of Flowering Plants: Tristichacee: Dr. }. C. Willis.—The Forced or 
Cultural Production of Free, Spherical Pearls; a Preliminary Note on a 
New Method: J. Hornell.—Some Terrestrial Isopoda from New Zealand 
and Tasmania ; with the Description of a New Genus, Notoniscus: Prof. 
C. Chilton. : . 
CONTENTS. PAGE 
New. York Water Supply. “By BCi0. 220). 209 
Romance in Archeology. By L.W.K. ... 210 
Astronomy eC CMe Ore 211 
Textile Fibres . 3. Js Sail Se lpno: Bee 
Our Bookshelf ME Re en ie reer aes. Cao co Le 
Letters to the Editor :— 
Cellular Structure of Emulsions. —Sir Joseph Larmor, 
POR S: « Dr. Cecilie Deschi 1s) cee ra cee 
The Origin of the Moon and the Earth’s Contraction. 
-~Rev; ©; Fisher 2206... eas gee: sone eee aS 
Movements on Water Surfaces. Edward A. Martin; 
Prot..C.i V. Boysiiiois5-0e eae eae eed 
X-Ray Spectra —G. E. M. Jauncey ..:.. .. 214) 
An Optical Illusion.—Dr, F. W. Edridge-Green 214 
Some Life-Histories and Habits of Insects. (//us- 
trated.) By F. A. D. . ;._. Seto ts Zi 
The Mineral Industry of Ganadan nr ca a= A a HAO 
Improvements in the Binocular Microscope. (///us- 
trated.) By Prof. R. T. Hewlett etnies oe Sey 
The Scottish Antarctic Expedition . a) oO 
ly (CSS Siete oh Clenlnh BS vg ydotmagiyd oy oo | 21S) 
Our Astronomical Column:— ~ 
Astronomical Occurrences for May ... . 223 
Gometp1914a (Kritzingen) ease astern een esenite 228 
The April Meteoric Shower neat oils appa ere ctr 5 | 5 
The Pressure in the Reversing Layer of the Sun . . 224 
The New University of Zurich. ByG.. 224 
Radimeand Quack Mediciness 50-5. 2 sees 
Japanese Fishes and Nomenclature. ByJ.J... . 225 
The Canadian Entomological Service Reet a ee: 
Diseases of Plants. By F.C... . 226 
Easter Vacation Work at Port Erin. By W. A. H. 227 
Relations between the Spectra and Other Charac- 
teristics of the Stars.—I. By Prof. H. N. Russell. 227 
University and Educational Intelligence. . . . . . 230 
Societies and Academies | 274 4.2) aa-mene <ls yee etl 
Books Received . a ee! a, Oona ee oe 233 
Diary of Societies . 
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